Disaster in the North Sea brings the Doctor to Scotland. What is the mystery of Tullock Moor?

As the Time Lord's greatest enemies close in on a lone rebel ship, his conscience is troubled by a decision that could change the Daleks forever.

A Dalek fleet surrounds a lone rebel ship, and only the Doctor can help them now...

Ellis George is studying drama at the Young and Talented School of Stage and Screen, and appeared in Tropical Sun Food's first advert, produced in late 2013.

Angel Coulby  is an English actress. She made her television debut in the BBC comedy 'Orrible. She is best known for portraying the character of Queen Guinevere "Gwen" Pendragon in the BBC fantasy series Merlin.

Coulby trained at Queen Margaret University in Edinburgh where she studied for a degree in acting. She is seen in an episode of Scariest Places on Earth (#2.10 - Exorcism: Greyfriars Cemetery 1) as a student (Awassa Tact) who had an encounter with a ghost. Her breakthrough came in 2001 with her role in the Johnny Vaughan vehicle 'Orrible. She was later chosen to playGwen, a young woman who would later become Queen Guinevere the legendary wife of King Arthur and Queen of Camelot, in the BBC One fantasy TV series Merlin. 

She has been announced as starring in the upcoming BBC Two Stephen Poliakoff drama Dancing on the Edge

Alan Johns played Ted Rogers in the Doctor Who serial The Tomb of the Cybermen.

Other work includes The Persuaders! and Z Cars

Peter Cartwright's long career spans back to Armchair Theatre in the 1960s, and includes roles in Danger UXB, Rumpole of the Bailey, Yes, Prime Minister, and most famously as Bishop George Postlethwaite in Emmerdale. He also played Elphias Doge in Harry Potter and the Order of the Phoenix.

Donald Hewlett is an English actor best known for his sitcom roles of Colonel Charles Reynolds in It Ain't Half Hot Mum and Lord Meldrum in You Rang, M'Lord?, both written by Jimmy Perry and David Croft. 

Hewlett attended Cambridge University where he was part of the Footlights Revue. During World War II he joined the Royal Navy and was stationed for several years in Kirkwall in the Orkney Islands before being posted to Singapore.

His first professional acting job was in repertory theatre at the Oxford Playhouse where he worked alongside Ronnie Barker. His first television acting role was the part of Lincoln Green in 1954's Orders are Orders.

His television appearances included The Ronnie Corbett Show, The Saint, The Avengers and The Dick Emery Show. However, he gained his most prominant role in the 1970s Croft and Perry sitcom It Ain't Half Hot Mum as Colonel Charles Reynolds. He was later reunited with fellow actor Michael Knowles in another David Croft sitcom, the sci-fi spoof Come Back Mrs. Noah, and later with the more successful You Rang, M'Lord? in 1989 as Lord George Meldrum. 

Other roles included 'Winkworth' in Morris Minor's Marvellous Motors in 1989 and The Adventures of Brigadier Wellington-Bull. His last TV appearance was in The Upper Hand in 1995.

He had a number of film appearances including Spike Milligan's Adolf Hitler - My Part in His Downfall, A Touch of Class, Carry on Behind and The First Great Train Robbery. 

Donald Bisset was a British actor. 

He played Colin McLaren in the 1966 Doctor Who story The Highlanders.

He also wrote stories for children which he mostly illustrated himself. They have been translated into 16 languages.

He worked on The Bill, The Black Velvet Gown, Campion, One Foot in the Grave, Agatha Christie: Poirot, William Tell, The Hound of the Baskervilles, Little Dorrit, Paradise Postponed, The Return of the Antelope, The Invisible Man, A Pattern of Roses, Only Fools and Horses...., Ragtime, Scarf Jack, Smuggler, The Old Curiosity Shop, Les Miserables, The Professionals, The Thirty Nine Steps, Life of Shakespeare, Warlords of Atlantis, Love for Lydia, Beryl's Lot, Are You Being Served?, Escape from the Dark, The Bawdy Adventures of Tom Jones, Play for Today, The Pallisers, Microbes and Men, The Double Dealers, Pollyanna, Freewheelers, Clinic Exclusive, For the Love of Ada, Nearest and Dearest, Blind Terror, Yak, Doctor in the House, Two a Penny, The Six Wives of Henry VIII, Carry on Again Doctor, Special Branch, Z Cars, The Beverly Hillbillies, The Expert, Mum's Boys, The Troubleshooters, Rocket to the Moon, Eye of the Devil, R3, No Hiding Place, The Saint, Thorndyke, The Indian Tales of Rudyard Kipling, Boyd Q.C., The Hidden Truth, Hide and Seek, Crane, Dr. Finlay's Casebook, Suspense, The Odd Man, Dixon of Dock Green, The Pursuers, Emergency-Ward 10, The Adventures of Robin Hood, On Trial, A Touch of Larceny, The Battle of the Sexes, Friends and Neighbours, The Headless Ghost, Broth of a Boy, Up the Creek, The New Adventures of Martin Kane, Little Red Monkey, The Brain Machine, BBC Sunday-Night Theatre, Murder in the Cathedral, Movie-Go-Round

Anthony Debaeck was a Belgian actor who played the French newsreader for Doctor Who, Torchwood and The Sarah Jane Adventures stories. 

Also worked on Dragon Age II, Carmen in 3D, Zalika, The Wolfman, 1066, Clash of the Santas, Carmen, Wire in the Blood, The Queen, Septième ciel Belgique, Love Soup, Femmes de loi, Léopold, Les vacances de l'amour, Elisa top modèle, Au port de la lune, Premiers baisers, Le collège des coeurs brisés, Johnny, L'été de la révolution

Alan Wheatley was a radio announcer who turned to stage and screen acting in the 1930's. He featured in many British films and television productions during the black and white era.

Wheatley left his job as an industrial psychologist to start an acting career. He made his film debut in the 1936 movie Conquest of the Air. During the Second World War, he worked for BBC Radio, both as an actor and as an announcer.

He is probably best known for his role as the Sheriff of Nottingham in the TV series The Adventures of Robin Hood in the 1950s, where he played the malevolent adversary to Richard Greene's Robin Hood. 

He had roles in Danger Man and The Avengers; and was the first person killed by a Dalek in an episode of Doctor Who, when he played Thal leader Temmosus in 1964. He was also an early Sherlock Holmes in a 1951 BBC TV series.

His film credits include: Caesar and Cleopatra (1945), The Rake's Progress (1945), Brighton Rock (1947), Calling Paul Temple (1948), Spaceways (1953), Simon and Laura (1955), A Jolly Bad Fellow (1964), and Tomorrow at Ten (1964) amongst others. He also appeared in Inn for Trouble (1960), a big screen spin-off from the popular TV comedy series The Larkins.

On stage he played Clifford Bax's The House of Borgia in 1935, as well as taking the lead in This Way to the Tomb - performed in London and Paris. He also played the tormented soul, Harry, in The Family Reunion.

Alan Wheatley also collaborated with the BBC English by Radio in a series of programmes for teaching English. He acted as "grandfather" in the series Ann and her Grandfather together with Brenda Cleather who acted as his granddaughter. 

Heplayed the Abbe in the BBC radio series The Count of Monte Cristo with the young Andrew Sachs playing Dante.

He died in Westminster in 1991 of a heart attack, at the age of 84.